Publication:

Discrimination of two-point touch sense for the upper and lower extremity based on body mass index in young adults: an observational study

Background To establish normative values for two-point discrimination (TPD) across 11 dermatome regions in the upper and lower limbs while examining the correlation between TPD and body mass index (BMI) and the influence of gender-based variations on sensory perception.

Methods A cross-sectional observational study conducted with 200 healthy participants (100 males, 100 females) to measure TPD thresholds and analyse correlations with BMI. This study was carried out in a controlled clinical setting, ensuring minimal environmental interference in sensory assessment. Participants were tested in quiet, temperature-controlled conditions to maintain reliability. Normative values for TPD in upper and lower limb dermatome regions, Correlation between TPD and BMI assessed using Karl Pearson’s correlation test. Gender-based correlation differences evaluated using Karl Pearson’s correlation test.

Results A statistically significant positive correlation (p 0.05) in TPD were found between males and females, suggesting BMI influences sensory perception similarly across genders. Regional variations in TPD were noted, emphasizing differences in tactile acuity across limb areas.

Conclusions This study successfully established reference values for TPD, providing critical insights into sensory perception variations based on BMI. The findings challenge previous assumptions by confirming BMI as a significant factor in tactile sensitivity. Standardized testing protocols are recommended for clinical applications and future research in neurophysiology and rehabilitation.